Daniel's question this week is a forced-choice scenario. An A320 or a 737, something's gone badly wrong, and the crew has three options. A grass runway that happens to be long enough for the landing weight. A road with live traffic but a clear path to roll out. Or open water, a proper ditching. What does the crew pick, and what are the odds of walking away from each one?
And the framing matters here. Daniel's not asking what the manual says in some abstract sense. He's asking what a trained crew actually does when the airplane's already in trouble and these are the three cards on the table.
My instinct says the grass runway wins and it's not close. But I want to hear you complicate that, because I suspect the data's messier than the instinct.
The instinct's right for the obvious reasons, and then the data gets interesting underneath it. A grass runway is still a runway. It's surveyed, it's clear of obstacles, there's no third party standing on it. The two things that kill you in an emergency landing are hitting something solid and hitting somebody. Grass removes both.
So the hierarchy is surface first, people second, and water only when nothing else exists.
That's how crews are trained to think about it. The airplane is expendable. The goal is a controlled touchdown at the lowest possible speed on the smoothest surface you can actually reach. AOPA's guidance is blunt about this. Saving the cockpit is the primary objective. The airframe is, their phrase, an expendable collection of aluminum, steel, rubber and fluids.
That's a refreshingly unsentimental way to describe a hundred million dollars of airliner.
And it's correct. The crew's job is not to preserve the aircraft. It's to preserve the people in it. So the grass runway is the boring answer, and boring is what you want in an emergency.
But grass isn't pavement. What actually happens when a jet that size touches down on turf?
The gear can snag. Soft ground grabs the wheels, rough ground pounds the struts. There's a study of over two hundred forced landings that found forty-four percent of open-field landings ended with the aircraft flipped onto its back. Now that's mostly light general aviation aircraft, not airliners, and a prepared grass runway is very different from a random field. But the failure mode is real. Gear collapse, nose gear digs in, the thing pitches over.
Forty-four percent inverted is a number that should make anyone pause before romanticizing the grass option.
Right. But look at the actual airliner cases. Gimli, Air Canada 767, ran out of fuel at forty-one thousand feet and glided seventeen minutes to a former RCAF runway that had been turned into a drag strip. Touched down on the pavement, blew two tires, collapsed the nose gear. Sixty-nine people on board, no fatalities, ten injuries. The airplane was repaired and flew for another twenty-five years.
That's the dream outcome, and it's also a reminder that the surface matters less than the obstacles. Gimli worked because there was nothing to hit.
A grass runway long enough for an A320 or 737 is already doing most of the work. The grass part is a risk factor, but it's a known risk factor. The crew can plan for it. Flaps full, touchdown as slow as possible, keep the nose up as long as you can.
What about the road? Daniel specified traffic, but a clear path. That's the part that makes it a real option instead of a suicide pact.
And this is where the ethical dimension shows up, because the road is the only one of the three options where the people at risk aren't all on the airplane. Every road landing case I can find killed people on the ground, not in the aircraft.
Say more.
King Air 200, British Columbia, March of last year. Highway landing, struck two vehicles. One driver on the ground was killed. All eight people on the airplane walked away with minor injuries. Malaysia, August twenty twenty-three, a private jet crashed on a highway. Ten dead, and that number includes people on the ground.
So the aircraft occupants survive at a surprisingly high rate, and the bystanders absorb the cost.
That's the pattern. Roads are hard, flat, and long, which is good for stopping an airplane. But they have traffic, signs, wires, bridges, median barriers. The airplane's path is clear at the moment the crew commits, and then a car pulls into it.
And the crew can't know that won't happen. They're making a decision with incomplete information about a moving environment.
Which is why a road with traffic is a desperation choice, not a first choice. The data on road forced landings shows no fatalities among the aircraft occupants in the cases studied, but that's a small sample, and it completely misses the point. The road is the only option where the crew is choosing to put uninvolved people in danger.
That's the thing that would keep me up at night. If I'm the captain and I put it down on a road and a minivan pulls into my path, I've killed someone who was just driving home.
And that's a different kind of weight. If you ditch and someone drowns, they were on your airplane. They were already in the emergency with you. If you land on a road and kill a driver, you brought the emergency to them.
So we've got grass as the clean choice, road as the morally complicated choice. What about water?
Water is the one people assume is worst, and the data says it's more survivable than the public thinks, but it's also the one where the danger shifts to after the touchdown.
That's the part I find surprising. The impact isn't the killer.
The peer-reviewed data on ditching is striking. A study of seventy-seven ditchings in the United States between nineteen eighty-two and twenty twenty-two found ninety-five percent of occupants survived the initial impact. The deaths happened afterward. Nineteen percent died post-ditching, and twenty-one of those thirty-two deaths were drowning.
So you survive the crash and then you're in the water, and now the clock is running.
And hypothermia is the other half of it. AOPA's guidance says hypothermia claims nearly half the victims of ditchings. The landing itself is survivable. The environment afterward is what kills.
Which means the ditching outcome depends enormously on where you are and who's coming to get you.
The Hudson is the perfect illustration. Sullenberger put an A320 into the river at a hundred and twenty-five knots, nine and a half degrees nose up, descending seven hundred and fifty feet per minute. One hundred and fifty-five people on board, zero fatalities. And the reason it worked wasn't just the touchdown. It was that ferries were alongside within minutes, in a river, in daylight, in a city with rescue infrastructure everywhere.
Put that same ditching in the North Atlantic in winter and the outcome's different. The touchdown's the same. The survival isn't.
The overall survival rate for ditching in the peer-reviewed data is seventy-six percent. That's not terrible. But it's worse than land forced landings, and it's highly dependent on factors the crew can't control. Water temperature, sea state, rescue proximity, whether the airplane breaks up on impact.
What about the transport category specifically? Daniel asked about an A320 or 737, not a Cessna.
The FAA and Transport Canada did a big review of ditching standards. Between nineteen sixty-seven and two thousand nine, there were a hundred and nineteen ditching fatalities across all transport category airplanes. That's about three per year. Turboprops accounted for ninety-five of those, turbojets only twenty-four. And there have only been three jet ditchings in that entire period, two of them into rivers.
Three jet ditchings in forty-three years. That's how rare this event actually is.
And no widebody has ever ditched. So when we talk about an A320 or 737 ditching, we're talking about an event with almost no direct precedent. The Hudson is the data point, and it's one data point.
That's a humbling thing to build a decision on. The crew's choosing between options where the sample size is tiny.
Which is why the training emphasizes geometry and energy over statistics. The question isn't what's safest in the abstract. It's what can I actually reach with the altitude and airspeed I have left.
Sullenberger rejected two airports because he judged he couldn't make them. The NTSB backed him on that.
And his testimony was stark. Attempting to reach an airport would, his words, have likely killed those onboard and more on the ground. The NTSB concluded ditching gave the highest probability of survival given the circumstances.
So the ranking isn't fixed. It's conditional on where the airplane is and what it can still do.
For Daniel's scenario, the grass runway is the answer if it's reachable. A crew will take a prepared surface with no obstacles and no third parties over any other option. The grass adds risk of gear collapse, but the occupants are on land, the airplane's not going to sink, and rescue is straightforward.
And the fatality numbers for open-field landings are good. One fatality out of sixty-five open-field forced landings in that study.
That's the Equipped to Survive data from the early two thousands. One fatality in sixty-five. The injury rate is higher than ditching, interestingly. Land forced landings have a lower fatality rate than water but a higher serious injury rate.
That makes intuitive sense. On land you hit something solid and stop suddenly. In water you decelerate more gradually but then you might drown.
The two datasets play against each other. The old aviation safety wisdom was that water is safer than trees or rocks. Then the same researcher went back and found land forced landings actually had a lower fatality rate, three percent versus twelve percent for ditching in his sample.
So the water is safest myth got torpedoed by the data.
And it's still contested. The peer-reviewed ditching study from twenty twenty-four shows seventy-six percent survival, which isn't catastrophic. But the AOPA number for ditching fatality rate is around twenty percent for general aviation, versus ten percent for forced landings overall.
So the grass runway is the clear winner on fatality risk. The road is murkier because the occupants usually survive but bystanders die. Water is the wildcard.
And the road's unique hazard is the thing you can't quantify. No aggregate statistic exists for third-party road fatalities in emergency landings, because every case is different. The road's risk is entirely about what's on it at the wrong moment.
Which is why a crew would take the grass runway over the road every time, even if the road is paved and the grass is soft. The pavement advantage doesn't outweigh the traffic risk.
The road only wins if the grass runway isn't actually reachable. And Daniel specified the grass runway is long enough for the landing weight, which removes the usual objection.
What about the actual touchdown on grass in a jet that size? You mentioned gear snagging. What's the realistic damage?
Expect the gear to take a beating. The main gear will probably punch through the turf and dig in. Nose gear is the vulnerable one. If it digs in first, the airplane pitches forward, and you get the classic nose-over or at least a collapsed nose gear and a belly slide.
So structural damage is likely but survivable.
The airframe's probably a write-off. But the occupants are walking away or being helped out with injuries rather than being recovered from the water.
The Ural Airlines cases are the best recent land analogues. The cornfield one in twenty nineteen, an A321 after a bird strike, two hundred thirty-three people, no fatalities, twenty-eight injuries. The wheat field in twenty twenty-three, an A320 with hydraulic failure, a hundred sixty-eight people, no serious injuries.
And the wheat field one plowed a twenty-three hundred foot furrow. That's the thing about soft ground. It decelerates you fast. The airplane dug in and stopped.
Which is brutal on the airframe but gentle on the humans, relatively speaking.
The MAK report on the cornfield one was actually critical of the crew. Said their actions showed disorganization, inconsistency, chaos, partial psychological incapacitation. And they still got everyone out alive.
That's almost reassuring. Even a crew that's falling apart can get a good outcome on land.
On land, yes. In water, the margin for error is thinner. If you touch down with a wing low, the airplane cartwheels. If the fuselage breaches, it floods. If the exits are underwater, egress becomes the whole game.
And egress is where the drowning numbers come from.
Ninety-five percent survive the impact. Nineteen percent die afterward. That gap is the egress problem. Getting out of a sinking airplane, in cold water, possibly at night, possibly with injuries.
So if I'm ranking Daniel's three options for a crew, it's grass first, road second, water third. But the road second is a distant second, and water is only taken when the other two aren't actually available.
And the crew's decision is made in seconds. They're not consulting fatality tables. They're looking at what's in front of them, what the airplane can still do, and what puts the fewest people at risk.
The grass runway's the only option where the crew isn't making a trade. The road trades bystander risk for occupant safety. The water trades impact survival for post-impact survival.
That's the cleanest way to put it. The grass runway is the only one of the three where the hazards are all in front of the crew and none of them are people.
Daniel asked about structural damage and fatality likelihood for each. Let's put numbers on it. Grass runway, structural damage likely, gear collapse probable, airframe write-off possible. Fatalities, very low. The open-field data says roughly one to three percent.
Road with traffic. Structural damage moderate to severe, depending on what gets hit. Fatalities for occupants, low in the small sample we have. Fatalities for third parties, the dominant risk and impossible to predict.
Water. Structural damage, the airframe is almost always a total loss. The Hudson's A320 had holes torn in the fuselage and lost an engine. Fatalities, roughly twenty percent in general aviation ditching data, seventy-six percent survival in the peer-reviewed transport-adjacent data. And the deaths are mostly drowning and hypothermia after the impact.
The ditching fatality rate for transport category specifically is harder to pin down because the sample is so small. A hundred and nineteen fatalities over forty-three years sounds low, but there were only three jet ditchings in that period.
So the honest answer to Daniel is that the crew picks the grass runway if it's actually reachable, and the data supports that choice. The road is a last-ditch land option with a moral cost. The water is a calculated gamble that the rescue environment will be good enough.
The thing most people get wrong is thinking water is automatically fatal. It's not. The impact is survivable. What kills is the minutes and hours afterward.
The Hudson worked because it was a river, in daylight, with ferries minutes away. The same touchdown in the open ocean at night is a different story.
That's the variable the crew can't control. They can fly the touchdown. They can't control the water temperature or the sea state or how fast rescue arrives.
The grass runway is the answer, and it's not close. The interesting part is why it's not close, which is that it's the only option that doesn't introduce a new hazard.
A runway is a runway. Grass is worse than pavement, but it's still a surveyed, obstacle-free surface. The crew knows what they're dealing with.
I keep thinking about the forty-four percent inverted number. That's the scary part of the grass option, and it's mostly light aircraft. A jet that size has more mass and more momentum. The gear's going to take the hit.
The crew can mitigate it. Full flaps, minimum touchdown speed, hold the nose off as long as possible, let the mains dig in and slow the airplane before the nose comes down.
It's the same technique as a soft-field landing in a Cessna, just scaled up to a hundred and fifty thousand pounds.
The physics doesn't change. Soft surface, keep the weight off the nose. The consequences of getting it wrong are just bigger.
What about the road's surface? It's actually the best landing surface of the three. Hard, flat, long.
That's the trap. The surface is ideal. The environment is the problem. A road is a linear obstacle course. Signs, poles, wires, bridges, overpasses, and the traffic Daniel specified.
The traffic is the part that makes it a moral question. The crew's choosing to put a jet down in a space shared with cars.
They can't clear it. They can't warn anyone. They're committing to a landing on a surface where a car could appear at any moment.
The King Air case is the cleanest illustration. Eight people on the airplane, all survived. One person on the ground, dead. The airplane's occupants were fine. Someone's commute ended.
That's the trade the grass runway doesn't ask you to make.
We've got a clear answer for Daniel. Grass runway first, and it's not a close call. The crew takes it if it's reachable.
If it's not reachable, the decision gets harder. Road versus water depends on what's on the road, what the water is, and what the rescue picture looks like.
The road's probably the second choice if the traffic is light and the path is clear. The water's the last resort.
SKYbrary's guidance is explicit. Ditching is only contemplated when no other realistic option remains.
Which is exactly how a crew would treat it. The Hudson only happened because Sullenberger judged the airports were out of reach.
The NTSB affirmed that. Given the circumstances, the river gave the highest probability of survival.
But the circumstances included a river, not open ocean. Daniel specified sea. That's a colder, rougher, more isolated environment.
Open sea ditching is the worst version of the water option. Swell, wind, cold water, rescue potentially hours away. The survival numbers we have are skewed toward rivers and coastal waters.
The grass runway's advantage grows if the water is open sea.
The road's advantage over water also grows, because at least on the road you're on land, rescue can reach you, and the airplane isn't sinking.
The hierarchy holds. Grass, road, water. The data supports it, the training supports it, and the ethics support it.
The one place where the data's incomplete is the head-to-head comparison. Nobody's studied grass runway versus road versus water in a controlled way, because these events are rare and chaotic.
We're assembling the answer from separate datasets. Ditching studies, forced landing studies, individual case reports. The picture's coherent but it's a mosaic, not a controlled experiment.
The case reports are the most vivid part. Gimli, Hudson, the two Ural Airlines landings. The pattern is consistent. Land is better than water, prepared surfaces are better than unprepared, and people on the ground are the variable the crew can't control.
Daniel's scenario is almost a thought experiment in risk allocation. Who bears the risk in each option?
Grass runway, the risk is all on the occupants. Road, the risk is shared with strangers. Water, the risk is on the occupants plus whoever has to rescue them.
The grass runway is the only one where the crew isn't making a decision for anyone else.
That's probably the deepest reason it's the first choice. It's the only option where the moral calculus is clean.
Hilbert: You're both right.
Hilbert: I lost money on a grass strip once. Nineteen seventy-nine. I was flying cargo out of a little field in Ohio, grass runway, maybe three thousand feet. We had a DC-3 with a bad engine, and the owner wanted one more trip out of it before the overhaul.
Hilbert: Left engine quit on takeoff. I put it back down on the grass, and the right gear dug in soft and the whole thing ground-looped. Nobody hurt. The airplane was a write-off. The insurance paid out, but the owner had underinsured it, so he came after me for the difference.
Hilbert: Cost me eleven thousand dollars. That was a lot of money in seventy-nine. I think about it every time someone says a grass landing is free.
The grass landing saved your life and cost you eleven grand.
Hilbert: The grass didn't cost me anything. The owner's insurance did. But I'm the one who wrote the check.
The DC-3's gear is famously rugged, and it still dug in. That's the thing about grass. It's not the landing that gets you, it's the stopping.
Hilbert: The stopping was fine. We stopped. The stopping's what bent everything.
The grass runway's the right answer, and it still cost you eleven thousand dollars.
Hilbert: It was the right answer because the other option was a cornfield with a drainage ditch. I'd have paid twenty thousand to avoid that.
The drainage ditch is the thing. Grass runways are clear. Fields aren't. That's the whole difference.
Hilbert: I looked at the field. I'd flown over it a hundred times. It had a ditch running across the middle. The runway didn't. That was the decision.
You'd take the grass again.
Hilbert: I'd take the grass every time. I'd just check the owner's insurance first.
That's the other lesson from the data. The airplane's expendable. The problem is when the airplane's value is tied to someone's financial survival.
Hilbert: He survived. I survived. The airplane didn't. Eleven thousand dollars was what it cost to learn that grass is better than a ditch.
The one thing I'll take from this is that the grass runway wins because it's the only option that doesn't introduce a new hazard. The road introduces strangers. The water introduces the sea. The grass just asks you to land badly on a surface that's already there.
The crew knows it. The training says take the prepared surface. The data says the prepared surface is safest. The only reason to pass it up is if you can't reach it.
Daniel's question has a clean answer. Grass first, road second, water last. The interesting part is that the clean answer rests on a pile of messy, incomplete, contradictory data.
The messiest part is the water. The public thinks ditching is a death sentence. The data says it's survivable, but the survival depends on factors the crew can't control.
Which is why the crew avoids it. Not because it's automatically fatal, but because it's the option where the outcome leaves the cockpit's hands fastest.
Once you're in the water, the flying's over and the ocean takes over. On grass, the flying's over and you're just stopped.
I'd rather be stopped than floating.
Would the crew. That's the answer.
Thanks to Hilbert Flumingtop for producing, and for the eleven thousand dollar reminder that the right choice still has a price tag.
This has been My Weird Prompts. If you've got a scenario you want us to work through, email us at show at my weird prompts dot com.
We'll be back soon.
